Rod clamp



1932- v G. ZINGALI 1,873,731

ROD CLAMP Filed Feb. 2, 1932 INVENTQR 620060214 Zugafa WITNESSES 6 J BYA60 w lb Z4 I [a ATTORNEY Patented Aug. 23, 1932 stars imam GIOVANNIZINGALI, OF MQNTCLATR, NEW. JERSEY ROD ame Application filed February 2,1932. Serial No. 590,447.

This invention relates to rod clamps, and particularly, to clampssuitable for use for concrete forms, the object being to provide an thesame somewhat when the improved structure wherein a rod may be i clampedat one or more points and firmly held so that there can be no movementof the rod independent of the clamp.

Another object of the invention is to provi de a clamp for use inclamping rods extending through concrete forms so as to hold the rodsagain st longitudinal movement and molds against spreading, the clampsbeing so formed as to not only pinch the rods near their respective endsbut bend the same somewhat so as to present shoulders against whichstrain is brought when the rod is under tension.

Another object, more specifically, is to provide a clamp utilizing anapertured bracket and an aperture which accommodates a rod to be clampedand a sliding wedge permanently 1 carried by the bracket but slidablymounted therein so as to engage a rod extending through the aperture inthe bracket and bend parts are in clamping position. I

In the accompanying drawing- Figure 1 is a perspective view showing partof a concrete form and wall being cast therein, together with severalclamps embodying the invention, shown in operative position.

Figure 2 is a sectional view through Figure 1 approximately on line 22.

Figure 3 is a sectional view through Figure 4 approximately on line 33.

Fi ure 4 is an elevation of a complete clamp disclosing an embodiment ofthe invention.

Figure 5 is an enlarged detail perspective view of the clamping wedgeshown in Figure 4. I

Figure 6 is a sectional view through Figure d on line 6-6, the samebeing on an en larged scale.

Referring to the accompanying drawing byunumerals, 1 indicates theconcrete wall being cast, and 2 the mold. The mold 2 may be of anydesired kind, but, preferably, is the suitable bracing bars 3 and 4 heldin proper no position by longitudinal beams 5 and 6.. It

' Will be understoodthat a pair of beams 5'and .6'are arranged on eachside of the mold and are connected together by suitable wires or rods 7which rods are held in position and 55 against longitudinal movement bytheir respective clamps 8. It is to. be understood, of

course, that after the concrete 1 has set, and

it is desired to remove the mold or form, the

respective clamps are actuated for releasing 60 the rods 7, which rodsare'cut off and left in theiwall and the mold is moved to a new placesoas to be used again, newrods being used at the'new place. The clampsSmay be mounted at any desired point and maybe removed at any desiredtime. Each of these clamps is provided with a bracket 9having aperturesfor the nails 10 and an enlarged portion 11 provided with a rodreceiving aperture or passagew'aylQ and a wedge passageway13. 7 Theaperture 12 is offset slightly from the center of the. aperture 13 sovthat when the wedge 1 1 is moved toclamping position, it will bend therod 7, as illustrated particularly in Figure 6; In this way ofisetportions 7 or'shoulders 15 are providedwhich may act as abutments totake up the strain exerted on the rod 7 In this way the rod is not heldby, friction as is usually the case with clamps, but by an offset or anabutment, there being 0 some friction between the wedge 14 and the wirewhich will'hold the offset 15 in the desired position. The wedge 14- isprovided 1 with a body "16 which is 'arc shaped so as to fit into theaperture 13, said body merging as intoyan' enlargedzflan'ge 17 at oneend and a tapering end portion 18 at the opposite end. The body 16 alsomerges into a wedge-shaped web 19 which engages the rod '7, asillustrated-in Figure 6. The end structure 18 is pro- '90 vided with ashoulder 20 which is adapted to be engaged by the respective pins 21 and22 to prevent the wedge 14. from moving out of the bracket 9 when movingin one direction. A flange 17 prevents the we( ge 14; from moving out ofthe bracket 9 when being shifted in the opposite direction. In additionto this function of maintaining the wedge 1a in assembled relation withthe bracket, pins 21 and 22 act against the web 19 and against theundersurfaces 23 and 24 for preventing rotation of the wedge 14 in thebracket 9, thus holding the web 19 always in position for correctlyengaging the rod 7 I claim:

1. A rod clamp including a bracket'having a straight tubular largeaperture for receiving a clamping wedge and a smaller aperture merginginto the large aperture for receiving a rod to be clamped, said smalleraperture extending at right angles to the larger aperture and beingoffset from the center of larger aperture so as to be spaced therefromand from the periphery of the large aperture, and means for retainingsaid wedge in assembled relation with the bracket, said wedge having astraight portion for engaging the surface of saidlarge aperture and aninclined portion for pressing and distorting that portion of the rodextending through the rod receiving aperture.

2. A rod clamp including a bracket having a comparatively large wedgereceiving aperture, a rod receiving aperture arranged at right angles tothe wedge rece ving aperture and merging therein, said rod receivingaperture being ofiset from the center of the wedge receiving aperture,and a wedge slidingly mounted in the wedge receiving aperture formedwith a depending beveled portion adapted to engage a rod extendingthrough the rod receiving aperture for deforming the same so as topresent shoulders within the wedge receiving aperture there being ashoulder on each side of said depending portion and a pair of pinsextending into said largewedge receiving aperture to a point to engagesaid shoulder for preventing independent rotation of said wedge.

3. A rod clamp including a bracket, a

'wedge and means for holding the wedge in assembled relation with thebracket, said bracket having a wedge aperture and a rod receivingaperture, said wedge when in functioning position pressing against therod eX- Vtending through the rod clamp, said wedge having a pair ofparallel shoulders, said means for holding the wedge in assembledrelation with the bracket including'means engaging said shoulders forpreventing inde pendent rotation of the wedge without interfering withits sliding motion.

l. A rod clamp including a bracket, a wedge and a pair of pins carriedby the bracket and coacting with the wedge, said Wedge having a pair ofparallel surfaces engaging said pins whereby the pins will preventrotation of the wedge without interfering with its sliding motion, saidbracket having an aperture for receiving said wedge and a rod receivingaperture extending at an angle to the first mentioned aperture, saidwedge having a depending web formed with an inclined surface positionedto engage and deform a rod extending through the rod receiving apertureso as to form a shoulder within the first mentioned aperture.

GIOVANNI ZINGALI.

